Andrew Nolan, 30, of Carew Park, Southill is in a stable condition at the Mid-Western Regional Hospital.
Eric Fitzgerald, 23, of Ballysimon Road, Limerick, and Cornelius Fitzharris, 28, from Lucan in Dublin were killed instantly in the crash.
Nolan served four years in jail for his part in one of the most brutal murders ever in Limerick, carried out by the McCarthy-Dundon gang.
After the crash, gardaí recovered an imitation gun, balaclavas and house-breaking implements from the stolen BMW they were in.
It is believed they took off at high speed after a Garda patrol car turned on the road after seeing the BMW.
The office of the Garda Ombudsman are carrying out a separate investigation into the fatal crash.
Gardaí believe the three in the BMW travelled to West Limerick on a crime mission.
It is expected that Nolan faces will face arrest once he is allowed out of hospital.
Meanwhile, two ambulance crew received minor injuries when they were attacked early yesterday when they responded to an emergency call at Francis Street, near Limerick city centre. The two emergency medical technicians were set upon by a man aged 21.
The man was arrested by gardaí after the ambulance personnel put in a call for assistance.
Supt Frank O’Brien, Henry Street, said: “Any attack on members of the emergency services must be taken very seriously, whether this involves ambulance personnel, fire service or the gardaí.
“We must take these attacks very seriously, particularly attacks on ambulance personnel who respond to life-threatening situations and where time can be critical.”